After ruling against the US producers in March, the EU formally slapped five-year tariffs as high as 41% on US-made biodiesel in order to protect its home-grown industry, which officials say was devastated over the past few years by the dumping of subsidised US volumes onto the European market.

But the European Biodiesel Board (EBB), a trade body, says that “circumvention patterns” quickly began to emerge after the tariff was put in place.

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